One animal in Australia is so difficult to spot it has been named the hidden dragon lizard. The reptile, which blends perfectly into the reddish orange terrain, avoided documented sightings for years.

Draco lizards are small gliding reptiles found across Southeast Asia’s tropical forests. With wing-like membranes and graceful glides, Draco lizards are true “dragons” of the wild.

The dragons in the Harry Potter movies fly using wings made from modified forelimbs, just as birds and bats do. But real dragons — gliding lizards of the genus Draco — form their “wings” from flaps of ...